git/Documentation/gitrevisions.txt
Ævar Arnfjörð Bjarmason fe802bd21e push doc: correct lies about how push refspecs work
There's complex rules governing whether a push is allowed to take
place depending on whether we're pushing to refs/heads/*, refs/tags/*
or refs/not-that/*. See is_branch() in refs.c, and the various
assertions in refs/files-backend.c. (e.g. "trying to write non-commit
object %s to branch '%s'").

This documentation has never been quite correct, but went downhill
after dbfeddb12e ("push: require force for refs under refs/tags/",
2012-11-29) when we started claiming that <dst> couldn't be a tag
object, which is incorrect. After some of the logic in that patch was
changed in 256b9d70a4 ("push: fix "refs/tags/ hierarchy cannot be
updated without --force"", 2013-01-16) the docs weren't updated, and
we've had some version of documentation that confused whether <src>
was a tag or not with whether <dst> would accept either an annotated
tag object or the commit it points to.

This makes the intro somewhat more verbose & complex, perhaps we
should have a shorter description here and split the full complexity
into a dedicated section. Very few users will find themselves needing
to e.g. push blobs or trees to refs/custom-namespace/* (or blobs or
trees at all), and that could be covered separately as an advanced
topic.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-08-31 14:04:06 -07:00

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gitrevisions(7)
===============
NAME
----
gitrevisions - Specifying revisions and ranges for Git
SYNOPSIS
--------
gitrevisions
DESCRIPTION
-----------
Many Git commands take revision parameters as arguments. Depending on
the command, they denote a specific commit or, for commands which
walk the revision graph (such as linkgit:git-log[1]), all commits which are
reachable from that commit. For commands that walk the revision graph one can
also specify a range of revisions explicitly.
In addition, some Git commands (such as linkgit:git-show[1] and
linkgit:git-push[1]) can also take revision parameters which denote
other objects than commits, e.g. blobs ("files") or trees
("directories of files").
include::revisions.txt[]
SEE ALSO
--------
linkgit:git-rev-parse[1]
GIT
---
Part of the linkgit:git[1] suite